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Commit 6600b9dd authored by Jiro SEKIBA's avatar Jiro SEKIBA Committed by Ryusuke Konishi
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nilfs2: move definition of struct nilfs_btree_node 



This is a trivial patch to expose struct nilfs_fs_btree_node.
The struct should be exposed outside of kernel, for it is disk format.

Signed-off-by: default avatarJiro SEKIBA <jir@unicus.jp>
Signed-off-by: default avatarRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
parent 9b945d53

fs/nilfs2/btree.h

+0 −22
Original line number Original line Diff line number Diff line
@@ -33,28 +33,6 @@ 
struct nilfs_btree;

struct nilfs_btree;

struct nilfs_btree_path;

struct nilfs_btree_path;





/**

 * struct nilfs_btree_node - B-tree node

 * @bn_flags: flags

 * @bn_level: level

 * @bn_nchildren: number of children

 * @bn_pad: padding

 */

struct nilfs_btree_node {

	__u8 bn_flags;

	__u8 bn_level;

	__le16 bn_nchildren;

	__le32 bn_pad;

};



/* flags */

#define NILFS_BTREE_NODE_ROOT	0x01



/* level */

#define NILFS_BTREE_LEVEL_DATA		0

#define NILFS_BTREE_LEVEL_NODE_MIN	(NILFS_BTREE_LEVEL_DATA + 1)

#define NILFS_BTREE_LEVEL_MAX		14



/**

/**

 * struct nilfs_btree - B-tree structure

 * struct nilfs_btree - B-tree structure

 * @bt_bmap: bmap base structure

 * @bt_bmap: bmap base structure

include/linux/nilfs2_fs.h

+22 −0
Original line number Original line Diff line number Diff line
@@ -402,6 +402,28 @@ struct nilfs_segment_summary { 
#define NILFS_SS_SYNDT  0x0008  /* includes data only updates */

#define NILFS_SS_SYNDT  0x0008  /* includes data only updates */

#define NILFS_SS_GC     0x0010  /* segment written for cleaner operation */

#define NILFS_SS_GC     0x0010  /* segment written for cleaner operation */





/**

 * struct nilfs_btree_node - B-tree node

 * @bn_flags: flags

 * @bn_level: level

 * @bn_nchildren: number of children

 * @bn_pad: padding

 */

struct nilfs_btree_node {

	__u8 bn_flags;

	__u8 bn_level;

	__le16 bn_nchildren;

	__le32 bn_pad;

};



/* flags */

#define NILFS_BTREE_NODE_ROOT   0x01



/* level */

#define NILFS_BTREE_LEVEL_DATA          0

#define NILFS_BTREE_LEVEL_NODE_MIN      (NILFS_BTREE_LEVEL_DATA + 1)

#define NILFS_BTREE_LEVEL_MAX           14



/**

/**

 * struct nilfs_palloc_group_desc - block group descriptor

 * struct nilfs_palloc_group_desc - block group descriptor

 * @pg_nfrees: number of free entries in block group

 * @pg_nfrees: number of free entries in block group